Premium
ACCLIMATION TO TEMPERATURE IN THE MARINE COPEPOD, CALANUS FINMARCHICUS (GUNNER.)
Author(s) -
Hahow K.
Publication year - 1963
Publication title -
limnology and oceanography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.7
H-Index - 197
eISSN - 1939-5590
pISSN - 0024-3590
DOI - 10.4319/lo.1963.8.1.0001
Subject(s) - calanus finmarchicus , copepod , acclimatization , zoology , biology , respiration , oxygen , pelagic zone , crustacean , diapause , calanus , ecology , chemistry , anatomy , organic chemistry , larva
Acclimation of oxygen consumption to three experimental temperatures (4, 10, and 20°C) was studied in the pelagic copepod, Calanus finmarchicus (Gunner.). Oxygen consumption, when corrected for dry weight differences, reached minimal levels at the three temperatures after the unfed animals had been kept in the laboratory for periods up to three days. Those maintained at 4°C achieved their lowest rate in the shortest time. Overshoot of oxygen uptake was demonstrated when copepods were exposed to sudden temperature change. Oxygen consumption fell to a steady rate 6–8 hr after an increase of 5°C. Acclimated curves of respiration with superimposed acutely determined curves were constructed for Calanus collected in the spring and in the summer. From these curves it appears that the copepods do not acclimate to temperatures outside their seasonal temperature range but are able to compensate for temperature changes in the vicinity of the temperature of the water from which they are collected.